mediawiki-extensions-Math/modules/ext.math.css
Frédéric Wang 9f6257c329 Improve the way mathematical formulas are exposed to screen readers.
- Mark the png and svg fallback as aria-hidden="true".
- For browsers without good enough MathML visual rendering, 
  hide the <math> tag in a way that still makes it accessible to 
  screen readers.

Bug: 66537
Change-Id: I7ecf07a4da669d927e11265fd497a813786c6410
2014-10-05 17:48:41 +00:00

71 lines
2.8 KiB
CSS

/*
Document : ext.math
Created on : 23.09.2013, 13:55:00
Author : Physikerwelt (Moritz Schubotz)
Description:
Shows browser-dependent math output.
*/
@namespace m url('http://www.w3.org/1998/Math/MathML');
/* Default style for MathML. */
.mwe-math-mathml-inline { display: inline !important; }
.mwe-math-mathml-display { display: block !important; margin-left: auto; margin-right: auto; }
.mwe-math-mathml-inline, .mwe-math-mathml-display {
/* We try to hide the MathML formula in a way that still makes it accessible to screen readers. */
clip: rect(1px, 1px, 1px, 1px);
overflow: hidden;
position: absolute;
width: 1px;
height: 1px;
opacity: 0;
}
m|math {
/* Try OpenType MATH fonts, the WOFF fallback and the old math fonts */
font-family: Cambria Math, Latin Modern Math, STIX Math, LatinModernMathWOFF, MathJax_Main, STIXGeneral, serif;
}
@font-face {
/* WOFF version of Latin Modern Math.
See https://github.com/fred-wang/MathFonts */
font-family: LatinModernMathWOFF;
src: url(./LatinModern/latinmodern-math.woff);
}
/* Default style for SVG. */
img.mwe-math-fallback-svg-inline { display: none; }
img.mwe-math-fallback-svg-display { display: none; margin-left: auto; margin-right: auto; }
/* Default style for the PNG fallback. */
img.mwe-math-fallback-png-inline { display: inline; vertical-align: middle; }
img.mwe-math-fallback-png-display { display: block; }
/* Default style for the source fallback. */
.mwe-math-fallback-source-inline { display: inline; vertical-align: middle; }
.mwe-math-fallback-source-display { display: block; margin-left: auto; margin-right: auto; }
/******************************************************************************/
/* Browser-specific hacks are bad but let's use that for now...
See http://browserhacks.com/ */
/* For all browsers but IE < 9, hide the PNG fallback and show the SVG instead.
We override the default style for PNG and SVG above */
:root * > img.mwe-math-fallback-svg-inline { display: inline !important; }
:root * > img.mwe-math-fallback-svg-display { display: block !important; }
:root * > img.mwe-math-fallback-svg-inline + img.mwe-math-fallback-png-inline,
:root * > img.mwe-math-fallback-svg-display + img.mwe-math-fallback-png-display { display: none; }
@-moz-document url-prefix() {
/* For Gecko browsers, hide the SVG fallback and show the MathML instead.
We override the style for SVG and MathML above */
.mwe-math-mathml-inline, .mwe-math-mathml-display {
clip: auto;
overflow: visible;
position: static;
width: auto;
height: auto;
opacity: 1;
}
:root * > .mwe-math-mathml-inline + img.mwe-math-fallback-svg-inline,
:root * > .mwe-math-mathml-display + img.mwe-math-fallback-svg-display { display: none !important; }
}